Common St. Johnswort – Hypericum perforatum
Print
EmailHypericum perforatum L.
Clusiaceae (St. Johnswort family)
MI Status
Non-native
Life cycle
Multistemmed, shrublike perennial.
Leaves
Opposite, narrow oval to oblong leaves have round to pointed tips and entire margins, and attach directly to the stem. Leaves are covered with small, transparent dots when viewed against the light.
Stems
Erect with numerous branches and up to 3 feet tall. Herbaceous stems are often reddish in color and become woody at the base with maturity.
Flowers and fruit
Bright yellow to orange-yellow flowers with five petals are approximately 0.75 inch wide, often with several black dots along the petal margins. Fruit are capsules with three cells containing numerous dark brown to black, cylinder-shaped seeds.
Reproduction
Seeds and short runners.
Other Documents in this Series
You Might Also Be Interested In
-
CANR meets academic needs to prepare students for their futures
Published on February 1, 2020
-
MSU researchers examine how people reinvent techniques they have learned through educational animations
Published on October 7, 2020
-
MSU Forestry online master’s program producing productive graduates
Published on September 20, 2024
-
Michigan State University and Nanjing Agricultural University in China finalize dual-degree agreement
Published on September 12, 2019
-
How to support children after one year of virtual learning
Published on March 17, 2021
-
AFRE Undergraduate Advisor Ruthi Bloomfield Retires
Published on September 22, 2020
Accessibility Questions:
For questions about accessibility and/or if you need additional accommodations for a specific document, please send an email to ANR Communications & Marketing at anrcommunications@anr.msu.edu.